[ see-luh-kanth ]
/ ˈsi ləˌkænθ /


a crossopterygian fish, Latimeria chalumnae, thought to have been extinct since the Cretaceous Period but found in 1938 off the coast of southern Africa.

Origin of coelacanth

1605–15; < New Latin Coelacanthus originally a genus name, equivalent to coel- coel- + Greek -akanthos -spined, -thorned, adj. derivative of ákantha spine, thorn
Related formscoe·la·can·thine [see-luh-kan-thahyn, -thin] /ˌsi ləˈkæn θaɪn, -θɪn/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for coelacanth

British Dictionary definitions for coelacanth


/ (ˈsiːləˌkænθ) /


a primitive marine bony fish of the genus Latimeria (subclass Crossopterygii), having fleshy limblike pectoral fins and occurring off the coast of E Africa: thought to be extinct until a living specimen was discovered in 1938

Word Origin for coelacanth

C19: from New Latin coelacanthus, literally: hollow spine, from coel- + Greek akanthos spine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for coelacanth



1857, from Modern Latin Coelacanthus (genus name, 1839, Agassiz), from Greek koilos "hollow" (from PIE root *kel-; see cell) + akantha "spine" (see acrid). So called from the hollow fin rays supporting the tail. Known only as a fossil, the most recent one from 70 million years ago, until discovered living in the sea off the east coast of South Africa Dec. 22, 1938. The specimen was described by Marjorie Courtney-Latimer, who wrote about it to S.African ichthyologist J.L.B. Smith.

I stared and stared, at first in puzzlement. I did not know any fish of our own, or indeed of any seas like that; it looked more like a lizard. And then a bomb seemed to burst in my brain, and beyond that sketch and the paper of the letter, I was looking at a series of fishy creatures that flashed up as on a screen, fishes no longer here, fishes that had lived in dim past ages gone, and of which only fragmentary remains in rock are known. [J.L.B. Smith, "Old Fourlegs: The Story of the Coelacanth," 1956]
Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for coelacanth


[ sēlə-kănth′ ]

Any of various fishes of the group Coelacanthiformes or Actinistia, having lobed, fleshy fins. Coelacanths are crossopterygians, the ancient group of lobe-finned fishes that gave rise to land vertebrates. They were known only from Paleozoic and Mesozoic fossils until a living species (Latimeria chalumnae) was found in the Indian Ocean in 1938. A second Latimeria species was described in 1999.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.